Cross-wound package



April 23, 1940. c A 2,197,847

CRO S S WOI JND PACKAGE Original Filed Sept. 7,1934

. INVENTOR. F Charles F.- Damn Patented Apr. 23, 1940 UNITED STATESPATENT OFFICE I Celanese Corporation of Delaware of America, acorporation Original application September 7, 1934, Serial No.

Divided and this application March 6, 1937, Serial No. 129,332

9 Claims.

This invention relates to a device for forming cross wound packageshaving self-supporting ends such as cheeses, cones, etc. and moreparticularly to crosswound packages that are uniform. in twist andcontain no ends of less twist than the bulk of the yarn.

This application is a division of my application S. No. 743,067, 'filedSeptember '7, 1934, now Patent No. 2,096,316.

An object of the invention is the economic and expeditious production ofcross-wound packages in which the starting end of the thread or yarnthat contains practically no twist up to approximately the amount oftwist desired is removed 15 from the package without disturbing thesolidness thereof. Other objects 01' the invention will appear from theiollowing detailed description and drawing.

In the drawing where like numbers refer to the same or similar elements:

Fig. 1 is an end elevation partially in section of a part of a take-upmechanism of a cheese winding device with the invention attachedthereto.

Fig. 2 is a front elevation of a section of a take-up mechanism and issimilar in location of parts to the section shown in Fig. 1.

Fig. 3 is a front view of an attachment for the cheese winding deviceshown in attached posi- 3 tion in Figs. 1 and 2.

In the twisting and winding of thread it is customary to have a fastlyrotating bobbin containing the yarn to be twisted and a take-up packagedriven slower than the bobbin, thus imparting twist to the yarn. Theyarn is wound upon a core by the take-up device, guided thereto in amanner to crosswind the package by a reciprocatlng guide device. Theyarn after leaving the bobbin traverses a space allowed for theballooning of the yarn in the twisting action, and passes throughguides, cleaners and possibly treating devices before reaching thetake-up mechanism. For this reason and also because the machine as awhole or as a part has not reached the required speed and the formation45 ofthe balloon is not established, the first yarn or first few yardsof yarn coming to the take-up package has not the same degree of twistas that imparted to the yarn after the operation has been 50 completelystarted and balanced in speed. This length of yarn may be from afraction of a yard to ten yards in 'length when working on high speedmachines with low denier artificial filament yarns. Downward twistlngdevices are also employed in the art with the same results.

Formerly this length ofyarn was taken up by the take-up package woundthereon in the same manner as the yarn of the desired twist. In warping,weaving, knitting and other textile operations this end of yarn would befed to said devices and being of a difierent twist than the remainingyarn would result in a defect in the finished product. Further, inunwinding the yarn from the package, this low twist end would. draw thetwist from several yards of yarn in an attempt to equalize itself whichmight amount to as much as ten yards of yarn that could not be used withsafety.

By employing this invention this untwisted end may be removed from thepackage leaving only yarn of equal twists thereon. This is done withoutmaterially increasing the work of the twisting machine operator orslowing up the process whatsoever. Further, there is no weakening of thepackage or any drawing action that might cause tangling or sluffing ofyarns on the end of the package.

According to my invention the untwisted or unprocessed end of the yarnis wound on the take-up package core at one end not regularly coveredwith yarn, then, when the delivery of twisted or processed yarn reachesthe take-up package the yarn is automatically taken over by thereciprocating guide and a package formed. The core with its package isthen removed from the device and the ridge of yarn at the end, not apart of the main package, is unwound or cut off and the end thus leftfree is tacked to the core ina suitable manner. This invention isapplicable to both the upward and downward twisting device.

This invention is applicable to the winding of twisted yarns of cotton,wool, real silk, flax, artificial yarns or the like wherein across-wound package, such as a cheese, or other like package, isdesired. The term yarn as employed in the specification and in theclaims includes within its scope thread, assemblies or bundles of anumber of continuous filaments which may be in parallel relationship orwhich may be twisted together, artificial bristles, straws, strips offoil, or yarn spun from staple fibres. The yarns may or may not havebeen previously twisted, coated or otherwise processed.

Although this invention is applicable to any type of yarn, it is ofparticular applicability to yams formed of substantially continuousfilaments. The substantially continuous filaments may be formed in anyextruding a cellulose material in a liquid form suitable manner as bythrough suitable orifices such as the manufacture of filamentscontaining reconstituted cellulose, regenerated cellulose or organicderivatives of cellulose. Thus the filaments may contain such organicderivatives of cellulose as the organic esters of cellulose andcellulose ethers. Examples of organic esters of cellulose are celluloseacetate, cellulose formate, cellulose propionate and cellulose butyrate,while examples of cellulose ethers are methyl cellulose, ethyl celluloseand benzyl cellulose. I p

The yarns may be twisted .by any suitable mechanism such as thosedescribed in U. S. application S. No. 695,963 filed October 31, 1933, ormore preferably by a device of the type described in U. S. applicationS. No. 742,108, filed August 30, 1934. In the drawing, wherein there isan illustration of one embodiment of the invention, those parts notdirectly related to the attachment have not been shown. However,reference may be made to the above applications for details of thegeneral mechanism.

In the drawing I is a power driven shaft having mounted thereon acylindrical roll 2 of metal or other suitable materials that may besuitably covered with a friction producing coating 3 such as pressedcork, fibre mat, felt or the like.

A stationary shaft 4 may have mounted thereon an arm 5 having a splitbearing 6 the pressure on which may be regulated by the screw I. Theshaft 4 is supported from the main frame of the device. Mounted in theend of the arm 5 opposite its pivot is a shaft 8 that supports a core 9upon which the take-up package is formed. The shaft 8 is held fromrotation by a split bearing I held compressed by the screw I I. A handleI2 cooperates with means I3, which does not form part of the instantinvention and which is shown in detail in application S. No. 742,108,filed August 30, 1934, Patent No. 2,048,787, for holding the core 9against rotation relative to the shaft 8, and in operative position toreceive the yarn to be wound.

In operation, at the commencement the core 9 or, if the operation hasbeen started, the wound yarn on the core '9 rests on the friction roller3 and is rotated thereby'at a constant peripheral speed. As the packageis being formed the yarn is guided to the package by a reciprocatingguide I4 that is fastened or clipped to a reciprocating rod I5. Thisguide member is of the self threading type. The stroke of reciprocationof guide I4 is slightly less than the length of the core 9 such that thepackage is formed with from to inch of core projecting from each end ofthe package. For example, a popular size package may have a core 5inches long while the actual mass of yarn is only 4% inches long withinch of core protruding from one end. The core may be formed of pressedpaper, cardboard, resin-flbre composition, molded resins, moldedcompounds of organic derivatives of cellulose or similar material and ispreferably formed with a yarn holding slot or notch 9' in one end forretaining and gripping the feed end of the yarn until the yarn has builtup to a sufficient depth not to slip on the core.

Mounted on the arm 5 and clamped in place by screw II is a bracket I6having a depending section Il containing an ear I8 on one side and astud shaft I9 on the other side thereof. Mounted for rotation on thestud shaft I9 is a bearing member having a slide bearing 2I thereinadapted to slidably hold a shaft 22. The shaft 22 has fastened at one ofits ends a pulley or grooved wheel 23 while the other end is threaded asat 24 for registry with a threaded hole in the ear I8. At the end of thethreaded section 24 of the shaft 22 is an abutment member 25 forpreventing the shaft 22 from falling out of the slide bearing 2I whenthe same is in a vertical position by coming in contact with one end ofbearing member 20 as is shown in dot-dash lines in Fig. 3.

In operation, the operator first secures the end of the yarn 26, inwhich a twist was inserted between the rotating spindle 28 and thepigtail guide 29, in the notch or slot 9' in the end 21 of the core 9 onwhich the yarn is to be wound. The core is then clamped on the device I3and the yarn placed over the grooved wheel 23 with the threaded shaft 22on which the wheel is mounted screwed into its innermost position in theear I8.

The core holding device is then lowered into place so that the core 9rests on the friction roll 3 which causes the core to rotate and take upthe yam., As the yarn is pulled over the grooved wheel 23, the wheel iscaused to rotate by the friction of the yarn and this in turn unscrewsthe threaded shaft from the ear of the bracket. When the shaft iscompletely unscrewed, the unbalanced load of the wheel and yarn causesthe wheel and shaft bearing to rotate on the bearing pivot I9 and fallout of engagement with the yarn as shown in dotted lines in Fig. 3.After the yarn has fallen from the groved wheel it lies in the path ofreciprocating guide member I4 which is self threading and immediatelypicks up theyarn and guides it onto the core 9 to form a crosswoundpackage. The operator may as soon as the yarn is picked up by guide I 4return the bearing member to a position shown in full lines in Fig. 3and screw the shaft back into the ear I8 into the starting positionready for the next package.

In this manner the untwisted end of the yarn is wound upon the firstsection of the core which is usually a half inch in length. The amountof thread wrapped on this section will depend upon the diameter of wheel23 and the pitch of the thread 24 on shaft 22 all of which may readilybe varied to accomplish the desired length of feed not to be included inthe finished package. The untwisted end of the yarn is thus wound on anormally exposed or naked section of the core in a completed package.The falling of the wheel 23 guides the yarn over to that section of thecore traversed by the guide I4 so that it may be picked up by the guideII unaided by the operator.

When the package has been formed, the same may be removed from thedevice-by raising the arm 5 and releasing the core clamping means I3-after which the package may be easily slipped off and an empty coremaythen be inserted in the device. The package may consistof a solid,well formed cheese of uniform yarn on a core and also a small ridge ofwindings on the normally naked end of the core. If desired the operatormay strip this ridge of windings from the core having just sumcientyarn, to suit subsequent operations, to be reinserted in the notch ofthe core. This may be done by removing the original end of the yarn fromthe notch and pulling the windings undone or on from the padkage end,severlng the yarn about a foot from where it crosses in under the mainpackage, rewinding the foot of yarn and hooking the new end in thenotch. Or if desired, the operator may cut through all but the last fewwindings of the auxiliary package or ridge in a stroke lengthwise thecore allowing the severed part to' fall off and then u fasten ,the newend in the notch or slot of the core.

Although the above description is primarily directed to thetwisting andwinding of yarn it is also generally applicable to any treatment orprocessing of yarn wherein the yarn is packaged into a cross-woundpackage such as a cone or a cheese or other package that has selfsupporting ends. Thus in applying size, lubricant, tints, dyes or othermaterial to the yarn during a winding operation it may be desired not toinclude in the finished package the uniformly treated starting end thatreceives too little or too much treatment during threading of the deviceand the gaining of a speed in equilibrium with the treating means suchthat the yarn begins to come to the package with uniform treatment.

It is to be understood that the foregoing detailed description anddrawing are merely given by way of illustration and many alterations maybe made therein without departing from the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patentis:

1. A device for changing the path of running yarns and like materialsafter a predetermined length of the material has run past a fixed point,said device comprising a wheel adapted to guide and be rotated by therunning material, said wheel being somounted as to be capable ofmovement out of contact with the material, means for restraining suchmovement during a predetermined number of revolutions of the wheel, andmeans for releasing said restraining means upon further rotation of saidwheel.

2. A device for changing thepath of running yarns and like materialsafter a predetermined length of the material has run past a fixed point,said device comprising a fixed support, a screwthreaded socket on saidsupport, a spindle screwthreaded to engage said socket, a wheel fast onsaid spindle and adapted to guide and be rotated by the material, saidwheel being urged bodily in a particular direction and being restrainedfrom movement in said direction so long as the spindle is in engagementwith the socket and being adapted to move in said direction whenrotation of the wheel has unscrewed the spindle from the socket.

3. A device for changing the path of running yarns and like materialsafter a predetermined length of the material has run pasta fixedpoint,said device comprising a fixed support, a screwthreaded socket on saidsupport, a member'pivotally mounted on said support and urged to swingin a certain direction, a bearing on said member, a spindle in saidbearing, said spindle being screw-threaded to engage said socket andthereby to restrain the plvotall'y mounted memher from swinging in thedirection urged, a wheel fast on said spindle, said wheel being adaptedto guide and be rotated by the material so long as the spindle is inengagement with the socket and in rotating to unscrew the spindle fromthe socket. v

4. A device for changing the path of running yarns and like materialsafter a predetermined length of the material has run past a fixed point,said device comprising a fixed support, a screwthreaded socket on saidsupport, a member pivotally mounted on said support and urged to swingdownwards, a bearing on said member, a spindle in said bearing, saidspindle being screwthreaded to engage said socket and thereby torestrain the pivotally mounted member from ,ing tension to pull theswinging downwards by gravity, a wheel fast on said spindle, said wheelbeing adapted to guide and be rotated by the material so long as thespindle is in engagement with the socket and in rotating to unscrew thespindle from the socket. 5

5. In a device for processing and cross-winding yarn into a package, thecombination with a core, a core holder and means for rotating the coreof means, for eliminating the first length of yarn from the package,including a wheel adapted for frictional drive from yarn being taken onthe take-up package, a rotating bearing supporting said wheel for movingthe wheel from contact with the yarn, a thread shaft driven by saidwheel for releasing said rotating bearing support.

6. In a machine for building yarn or likematerial into a cross-woundpackage, the combination with a package supporting core, driving meanstherefor and a self-threading traverse guide to lay the material on thecore, of means for causing the first part of the material to be wound atone end of said core on a part thereof outside that which thecross-wound package will occupy, said means comprising a guide wheel forthe material, means for retaining said wheel in a position to guide thematerial to said part of the core while keeping it out of the path ofthe traverse guide against the tendency of the windmaterial into thatpath, the wheel being adapted to move out of said position 'and out ofcontact with the material when the retaining means are released soallowing the material to move into said path, and being adapted when insaid position to be rotated by the material, the retaining means beingreleased by said rotation.

7. In a machine for building yarn or like material' into a cross-woundpackage, the combination with a package supporting core, driving meanstherefor and a self-threading traverse guide to lay the material on thecore, of means for causing the first part of the material to be wound atone end of said core on a part thereof outside that which thecross-wound package will occupy, said means comprising a screw-threadedsocket fixed to the frame of the machine, a spindle screw-threaded toengage said socket, a wheel fast on said spindle and adapted when thespindle is so engaged to guide the material to saidvpart of the corewhile keeping it out of the path of the traverse guide against thetendency of the winding tension to pull the material into that path, andto be rotated by the material so as to unscrew the spindle from thesocket, said wheel being adapted when rotation has withdrawn the spindlefrom the socket to move out of contact with the material so as to allowthe material to move into the path of the traverse guide.

8. In a machine for building yarn or like material into a cross-woundpackage, the combinaoccupy, said means comprising a screw-threadedsocket fixed to the frame of the machine, a member pivotally mounted onsaid frame, a bearing on said member, a spindle in said bearing, saidspindle being screw-threaded to engage said socket, a wheel fast on saidspindle and adapted when the spindle is so engaged to guidethe materialto said part of the core while keeping the r material out of the path ofthe traverse guide against the tendency of the winding tension to pullit into that path, and to be rotated by the material so as to unscrewthe spindle from the socket, the pivotally mounted member being adaptedwhen rotation of the wheel has withdrawn the spindle from the socket toswing the wheel out of contact with the material so as to allow thematerial to move into the path of the traverse guide.

9. In a machine for building yarn or like material into a cross-woundpackage, the combination with a package supporting core, driving meanstherefor and a self-threading traverse guide to lay the material on thecore, of means for causing the first part of the material to be wound atone end of said core on a part thereof outside that which thecross-wound package will occupy, said means comprising a screw-threadedsocket fixed to the frame of the machine, a member pivotally mounted onsaid frame, a bearing on said member, a spindle in said bearing, saidspindle being screw-threaded to engage said socket, a wheel fast on saidspindle and adapted when the spindle is so engaged to guide the materialto said part of the core while keeping the material out of the path ofthe traverse guide against the tendency of. the winding tension to pullit into that path, and to be rotated by the material so as to unscrewthe spindle from the socket, the pivotally mounted member being adaptedwhen rotation of the wheel has withdrawn the spindle from the socket toswing downwards, carrying the wheel out of contact with the material soas to allow the material to move into the path of the traverse guide.

CHARLES F. BERAN.

